• Tucson
  • Tongjiang

Tucson (/ˈtuːsɒn, tuːˈsɒn/; Spanish: Tucson, O'odham: Cuk-Ṣon) is a city in and the county seat of Pima County, Arizona, United States, and is home to the University of Arizona. It is the second largest city in Arizona behind Phoenix, with a population of 542,629 in the 2020 United States census, while the population of the entire Tucson metropolitan statistical area (MSA) is 1,043,433. The Tucson MSA forms part of the larger Tucson-Nogales combined statistical area (CSA). Both Tucson and Phoenix anchor the Arizona Sun Corridor. The city is 108 miles (174 km) southeast of Phoenix and 60 mi (97 km) north of the U.S.–Mexico border. Tucson is the 34th largest city and the 53rd largest metropolitan area in the United States (2014).

Major incorporated suburbs of Tucson include Oro Valley and Marana northwest of the city, Sahuarita south of the city, and South Tucson in an enclave south of downtown. Communities in the vicinity of Tucson (some within or overlapping the city limits) include Casas Adobes, Catalina Foothills, Flowing Wells, Midvale Park, Tanque Verde, Tortolita, and Vail. Towns outside the Tucson metro area include Benson to the southeast, Catalina and Oracle to the north, and Green Valley to the south.

Tucson was founded as a military fort by the Spanish when Hugo O'Conor authorized the construction of Presidio San Agustín del Tucsón in 1775. It was included in the state of Sonora after Mexico gained independence from the Spanish Empire in 1821. In 1853, the United States acquired a 29,670 square miles (76,840 km2) region of present-day southern Arizona and southwestern New Mexico from Mexico under the Gadsden Purchase. Tucson served as the capital of the Arizona Territory from 1867 to 1877. Tucson was Arizona's largest city by population during the territorial period and early statehood, until it was surpassed by Phoenix by 1920. Nevertheless, population growth remained strong during the late 20th century. In 2017, Tucson was the first American city to be designated a "City of Gastronomy" by UNESCO.

Tongjiang City belongs to Jiamusi City, Heilongjiang Province. Tongjiang City is located on the south bank of the confluence of Songhua River and Heilongjiang River in the northeast of Heilongjiang Province, between 132 °18 °32 "- 134 °7" 15 "east longitude and 47 °25 °47"-48 °17 °20 "north latitude. Fuyuan City is bordered by Fuyuan City in the east, Fujin City and Raohe County in the south, Songhua River and Suibin County in the west, and the Russian Jewish Autonomous Prefecture in the north. The border is 170 kilometers long. With a total area of 6300 square kilometers, it has jurisdiction over 6 towns, 2 townships and 2 nationality townships, with 6 state-owned farms and a total population of 211609 (2015). Tongjiang City is the main settlement of Hezhe nationality, one of the "six small" ethnic groups in China, and it is the starting point at the northern end of the "Tongsan" highway, which runs through the main artery of China's north-south highway. Within the territory
Airport In Tongjiang - Jiamusi Dongjiao Airport
Jiamusi Dongjiao International Airport (Jiamusi Dongjiao International Airport, IATA: JMU, ICAO: ZYJM), located on Chang'an East Road, Dongfeng District, Jiamusi City, Heilongjiang Province, China, 10 kilometers away from Jiamusi City, is a 4C-level military-civilian joint international feeder airport   .
Jiamusi Dongjiao International Airport was founded in 1932. Its predecessor was Jiamusi Station of Civil Aviation of China established in 1958. On December 10, 2009, Jiamusi Dongjiao Airport's first-class air port was officially opened to the public, and the airport became an international airport.   .
According to the official website of the airport in February 2021, Jiamusi Dongjiao International Airport has a terminal area of ​​5,728 square meters, a runway 2,500 meters long, and a width of 45 meters; the civil aviation station has 6 seats, which can park 5 C-class aircraft, B 1 class aircraft; it can meet the needs of annual passenger throughput of 300,000 passengers     .
In 2021, Jiamusi Dongjiao International Airport will handle a total of 805,700 passengers, a year-on-year increase of 21.7%; cargo and mail throughput will be 1,294.4 tons, a year-on-year increase of 0.4%; aircraft movements will be 6,968, a year-on-year increase of 20.6%.  
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